tigerlake: enable tcc_offset functionality

This enables Thermal Control Circuit (TCC) activation feature to set
tcc_offset to new value in devicetree.

BUG=None
BRANCH=None
TEST=Built for volteer platform and verified the MSR value.

Change-Id: I36b0d6aad4be8a9cbb145dcd66d65235d3f6ac35
Signed-off-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42513
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/soc/intel/tigerlake/cpu.c

@@ -216,4 +216,7 @@ void soc_init_cpus(struct bus *cpu_bus)
 {
 	if (mp_init_with_smm(cpu_bus, &mp_ops))
 		printk(BIOS_ERR, "MP initialization failure.\n");
+
+	/* Thermal throttle activation offset */
+	configure_tcc_thermal_target();
 }

src/soc/intel/tigerlake/fsp_params.c

@@ -213,6 +213,9 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	/* Enable TCPU for processor thermal control */
 	params->Device4Enable = config->Device4Enable;
 
+	/* Set TccActivationOffset */
+	params->TccActivationOffset = config->tcc_offset;
+
 	/* LAN */
 	dev = pcidev_path_on_root(PCH_DEVFN_GBE);
 	if (!dev)